Stop-cock.



No. 669,328. Patented Mar.' 5, lem.

F. sTAEDELa & G. voGT.

STOP COG-K.

(Application led June 18, 1900.)

(No Model.)

@L l N@ @gw-52m UNrrnD raras l ATENT OFFICE.

FELIX STAEDELI AND GUSTAV VOGT, OF NEW YORK, N. Y.

STOP-COCK.

SPECIFICATION forming part of Letters Patent No. 669,328, dated March 5,1901.

Application filed .T une 18, 1900. Serial No. 20,674. (No model.)

To @ZZ whom t may concern..-

Be it known that we, FELIX STAEDELI and GUsTAv VOGT, citizens of theUnited States, residing in the borough of Bronx, in the city and Stateof New York, have invented a certain new and useful Improvement in Stop-Cocks,of which the following is a specification.

The improvement is intended more especially for serving what are knownas soft drinks, the acids of which are liable to induce corrosion of theordinaryoocks. We do not, however, confine the invention to that use.The improved cock may serve for a great variety of purposes. We employ adiaphragm tightly joined to the casing around its edge and carrying athickened portion of the same or a different material made integral withthe diaphragm and kept always adjacent to a smooth circular seat.

We will show and describe the invention as discharging through a passagefrom the interior of the seat; but the conditions may be reversed, ifpreferred in any case, so that the liquid is received in the center andiiows outward between the valve and the seat when the valve opens. Theopening of the valve is effected by allowing the diaphragm, with itsthickened central portion, to move away from the seat. The closing iseffected by suitable mechanism arranged to force the thickened portioninto tight contact with the seat. We aid the movement by a spring, whichserves, in addition to the force of the liquid, in urging the diaphragmaway from the seat. Ve avoid any tendency of the screw action to revolvethe valve by interposing a piece which is not permitted to turn. Weguard the diaphragm against being forced too far by backing it with ametal piece. We prefer that this shall be made with radial arms.

The accompanying drawings form a portion of this specication andrepresent what we consider the best means of carrying out the invention.

Figure l is a central vertical section with the valve open, and Fig. 2is a plan View of certain portions detached, seen from below. Thislatter figure is revolved on eighth of a revolution relatively to theview in Fig. 1. The inclined dotted lines in Fig. 2 show the relation ofthe induction-passage to the wings of the spring.

Similar letters of reference indicate like parts in both figures wherethey appear.

A is a body or casing.

A is a slightly-tapering tube or nozzle of properV thickness. It is setAin a circular grooved orifice a in the lower portion of the casing A,the joint being made with cement E. The upper rim of this nozzle A' isaccurately finished.

B is the thick center of our diaphragm. It is made of hard rubber, withits upper and main portion deeply roughened or screw-threaded, as shown.Upon this previously-molded center of hard rubber is formed an additionof soft rubber, which is extended outward, much reduced in thickness, asindicated by B', and forms a strong and durable but yielding diaphragm.

It is important that the soft annular diaphragm shall be veryefcientlyjoined to the hard-rubber center. soft rubber in place upon thepreviously-molded hard-rubber center. To effect this, we provide theproper molds, with provisions for strongly closing them, capable ofholding the entire piece B B', and provide naphtha or rubber cementwhich contains a large proportion of naphtha. Apply this solvent in asufficient quanfity and for sufficient times to the screw-threaded orotherwise roughened surface of the partB to make those surfaces soft andready to weld with the soft-rubber conlposition when it is subsequentlyapplied to it. When all is ready, the hard-rubber center is held inposition in the mold and the soft-rubber composition is applied insufficient quantity, and the mold is closed and secured. The excess isforced out and may be saved, if desired. The treatment of the mass thusconditioned in the mold for a sufficient time to effect thepropervulcanization ofthe soft rubber makes a valve and diaphragmexactly adapted for our purpose. When this is put in place in thecasing, the outer edge of the soft-rubber diaphragm rests on a shoulderA3, which extends around the interior of the casing A.

C is a cap which engages by screw-threads in a hanging lip C', withcorresponding screwthreads on the exterior of the casing A.

H is a ring of metal provided with arms H', extending inward and unitedin' a hub H2.

We manufacture the IOO We shall refer to this entire piece H H H2 as aliubbed ring. The ring is of such depth that on screwing the cap Cforcibly down it presses the ring H down tightly upon the rim of thediaphragm and makes a tight junction between the latter and the offsetA3.

D D represent a spring of hard brass or other suitable material. Thering D engages under a circular annular bearing B2. When the parts areput together, the Wings or arms D rest on offsets A4, provided in theinterior of the casing A. The device serves asa spring to lift the valveB, with the diaphragm B', which is formed in one with it. The hub H ofthis hubbed ring is provided with a square hole h. In this hole isfitted a block I,which is free to move up and down, but can not revolve.

K K represent a screw-threaded stem carrying an ordinary hand-wheel.(Not shown.) When this stem is turned in the direction to raise it, thediaphragm B, with its thick center B, rises and the valve opens. Whenthis stem is turned in the opposite direction to d epress it, the squarepiece transmits the pressure to the yielding parts below withoutallowing the turning force to be felt and depresses the thickenedcentral portion B against the force of the spring D D' and of theliquid, and by pressing the lower face of the part B directly upon thenicely-finished upper rim of the glass tube o'r nozzle A holds the valvetightiy closed.

We attach importance to the fact that the center of the diaphragm isthick and that the main portion of this thickness projects below theannular margin, for the reason, among others, that this constructionallows much space for the water to approach the center in onearrangement of the flow and to retreat or iiow away from the center inthe other arrangement.

We attach importance to the fact that while the entire piece B B',constituting the valve and diaphragm, is elastic, the central portion isharder than the margin, for the reason, among others, that it receivesthe force of the operating-stem, communicated through the piece I,stiffiy and transmits it directly to the bearing-surface below, whilethe soft margin allows a liberal movement up and down.

We attach importance to the grooves in the interior of the passage a,because they allow the cement to take a firm hold of the iron or othermaterial of the casing. We employ a cement which adheres strongly to theglass. If it does not adhere so strongly to the metal, the parts will beretained by the aid of the grooves, which become filled with the cementand lock the nozzle.

Modiiications may be made without departing from the principle orsacriiicing the ad Vantages of the invention. We can make the entireportion B B of soft rubber at a single molding operation. By givingincreased diameter to the casing of the diaphragm we can make the Wholeof hard rubber at a single molding. To fully carry out our invention,two materials of differing hardness must be used, the harderconstituting the thickened portion at the center and the softerconstituting the thin extension at and near the periphery, permanentlyunited by means analogous to welding, so as to constitute a singlepiece. The material of the other parts may be varied. Porcelain willserve well for the tube or nozzle A. It is well, but not absolutelyessential, to have the exterior of the nozzle ground so as to be ltruethroughout. It may be short, as to not project appreciably below thebottom of the casing A.

The casing A may be of hard or soft brass or white-metal. We propose touse hard rubber in some cases for the casing. The cock may be used invarious positions, inclined or vertical instead of horizontal.

Parts of the invention may be used without the Whole. We can dispensewith the cement E by making the nozzle A with a true surface and makingthe hole in which it sets to exactly correspond.

Instead of molding the soft rubberB upon the previously-molded -hardrubber B and vulcanizing it in place, some good effect may be obtainedby molding it separately and complete, making the inner surface of thesoft rubber screw-threaded or of the form required to present surfaceswhich match fairly to the exterior of the hard-rubber piece and takingcare before putting them together to partially dissolve t-he contactingsurfaces by applications of naphtha. Thus conditioned, the parts beingapplied forcibly together and held together for a sufficient time willserve satisfactorily in many cases; but we prefer molding the softrubber upon the hard and Vulcanizing it in place, as first described.

We claim- 1. In a faucet having an elastic diaphragm and means foroperating such to control the flow, the hubbed ring H Hl H2 adapted toperform the triple functions of transmitting pressure from the top C fortightly holding the periphery of the diaphragm, guiding an in closedpiece I for transmitting the force of the operating-stem K, andsupporting the whole surface of the diaphragm when it has yielded to acertain exten t,all combined and arranged to serve substantially asherein specified.

2. In a faucet having an elastic diaphragm and means for operating suchto control the iiow, the non-corrodible tube or nozzle A adapted toserve as specified, a diaphragm formed in one piece, having a thickcenter and a thin annular extension, the movable piece I transmittingthe operating force thereto, and the hubbed ring H H H2 performing thetriple duty of tightly holding and releasing the edge of the diaphragm,guiding the piece I and supporting the diaphragm when the valveisopened,all combined and arranged to serve substantially as hereinspecified.

3. In a faucet having an elastic diaphragm IOO and means for operatingsuch to control the above set forth We affix our signatures in flow, thediaphragm constructed with a thick presence of two Witnesses.

center B and a thin annulus B formed in one FELIX STAEDELI. piecetherewith, both parts of elastic mate- GUSTAV VOGT.

5 rial, the central part harder than the margin, Witnesses:

all substantially as herein specified. JOHN SOHULZE,

In testimony that We claim the invention 'GOTTLIEB STAEDELI.

